We have a couple of projects for which we created Hudson jobs. We are
configuring them to pick up source code in SVN, and enter appropriate
credentials (Hudson tells us it is saving them in its credential safe). To make
sure everything's all right, we fire a build right away. But then, the day
after, we have an email from hudson saying our build has failed:

------------------------------------------
started
ERROR: svn: Authorization failed
org.tmatesoft.svn.core.SVNAuthenticationException: svn: Authorization failed
at
org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:47)
at org.tmatesoft.svn.core.internal.io.svn.SVNReader.parse(SVNReader.java:288)
at
org.tmatesoft.svn.core.internal.io.svn.SVNConnection.read(SVNConnection.java:210)
at
org.tmatesoft.svn.core.internal.io.svn.SVNConnection.authenticate(SVNConnection.java:93)
at
org.tmatesoft.svn.core.internal.io.svn.SVNRepositoryImpl.authenticate(SVNRepositoryImpl.java:991)
at
org.tmatesoft.svn.core.internal.io.svn.SVNRepositoryImpl.checkPath(SVNRepositoryImpl.java:216)
at
hudson.scm.SubversionSCM$DescriptorImpl.checkRepositoryPath(SubversionSCM.java:1224)
at hudson.scm.SubversionSCM.repositoryLocationsExist(SubversionSCM.java:1281)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:336)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:300)
at hudson.model.AbstractProject.checkout(AbstractProject.java:558)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:215)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:181)
at hudson.model.Run.run(Run.java:659)
at hudson.model.Build.run(Build.java:101)
at hudson.model.ResourceController.execute(ResourceController.java:70)
at hudson.model.Executor.run(Executor.java:71)
Publishing Javadoc
Recording test results

So we have to re-enter the credential again each morning.